Convert .NET Image to 1/3D double array

I have a requirement that convert a .net image to 3D(or 1D) double array for MATLAB use, but didn't find any related article about this. So I reference this to do that.

This is my code(image to 1D array):

Bitmap bitmap = new Bitmap(image);

double[] imagearray = new double[image.Height * image.Width * image.Height * 3];

int index = 0;

//In matlab matrix, row first

for (int i = 0; i < bitmap.Width; i++)   //column

{

for (int j = 0; j < bitmap.Height; j++, index++)  //row

{

Color pixelColor = bitmap.GetPixel(i, j);   //getpixel(x,y)

imagearray[index] = pixelColor.R;

imagearray[index] = pixelColor.G;

imagearray[index] = pixelColor.B;

}

}

This is my code(image to 3D array):

Bitmap bitmap = new Bitmap(image);

double[,,] imagearray = new double[image.Height, image.Width, 3];

//return;

//In matlab matrix, row first

for (int i=0; i < bitmap.Width; i++)   //column

{

for (int j = 0; j < bitmap.Height; j++)  //row

{

Color pixelColor = bitmap.GetPixel(i, j);   //getpixel(x,y)

imagearray[j, i, 0] = pixelColor.R;

imagearray[j, i, 1] = pixelColor.G;

imagearray[j, i, 2] = pixelColor.B;

}

}

So, you can convert image to n-D array at the same way.